Gallerie Black Triangle Geometric Wallpaper by Decorline. A modern geometric take on rustic design this wallpaper features a series of black triangular tiles. The tiles are given added depth with a woodgrain texture for chic earthy style. Gallerie is an unpasted non woven wallpaper. Gallerie Black Triangle Geometric Wallpaper is an unpasted non woven material. This wallpaper has a 20.9 inch repeat with a drop match and is both washable and strippable. Wallpaper comes on a roll that measures 20.5 inches by 33 feet and covers about 56.4 square feet. Decorline is a fusion of modern sophistication with a taste for luxury. These fine wallpapers bring contemporary dimension to walls in today s freshest colors. Applying modern scale chic texture effects and vivid hues to fashionable designs Decorline wallpapers have gorgeous style appeal.